Synonyms and related words :
aghast, alarming, anxious, awing, bashful, chilling, cowardly, crawly, creepy, daunting, deterrent, deterring, diffident, disconcerting, discouraging, disheartening, dismaying, disquieting, eerie, fear-inspiring, fearful, fearing, fearsome, frightened, frightening, frightful, goosy, hair-raising, horrendous, horrible, horrid, horrifying, in fear, intimidating, jumpy, mousy, nervous, overawing, rabbity, scared, scaring, shaky, shivery, shrinking, shy, skittery, skittish, spine-chilling, spooky, startling, startlish, terrified, terrifying, timid, timorous, trembling, tremulous, trepidant, trigger-happy